Also, donโt leave your account unused, delete it. User and follower numbers count.
And least as important, reply (if necessary to another corporate mail address) every email with Twitter/X in the footer, with a kind request to stop promoting and facilitating X.
In case someone thinks "Oh, he's just an alt-right troll, he doesn't actually believe in that stuff", meet Elon's grandfather:
He became involved in Canadian politics, backing the technocracy movement, before moving to South Africa in 1950. Over the course of decades, Haldeman repeatedly expressed racist, antisemitic, and antidemocratic views.[1] In South Africa he was a supporter of apartheid and promoted a number of conspiracy theories.